public class Stu {
    public String name;
    public int age;
    public String id;

    public Stu(String name, int age, String id) {
        this.name = name;
        this.age = age;
        this.id = id;
    }

    public void setStu(String name, int age, String id){
        this.name = name;
        this.age = age;
        this.id = id;
    }

    public void fun(String name, int age, String id){
        this.setStu(name, age, id);
    }
}
